Fragility of network-forming glasses: A universal dependence on the topological connectivity

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Abstract

The fragilities of over 150 different network-forming glass melts are shown to conform to a common dependence on just one parameter: the connectivity of the weakest network structure present in the associated glass solid. This includes both nonoxide network-forming chalcogenide melts as well as a variety of alkali oxide glasses, and spans a broad range of connectivity, φ, from polymeric structures (φ=2) to overconstrained random networks with connectivities well in excess of the rigidity threshold (φC=2.4). A theoretical framework for the origin of this universal pattern is offered within the context of entropic models of the glass transition.

Original languageEnglish (US)
Article number062804
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume92
Issue number6
DOIs
StatePublished - Dec 2 2015

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All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

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